Bevel-cut patch for tubes and other rubber goods



Aug. 17 1926. 1,596,430

J. G. GROSS BEVEL CUT PATCH FOR TUBES AND OTHER RUBBER GOODS Filed Aug.20, 1924 Patented Aug. 17,1926.

* UNITED js'ra 1135- PATENT OFFICE.

JACOB e. enoss, or SAN GABRI L, CALIFORNIA.

rnvrn-currmcn FOR runes AND OTHER RUBBER Goons...

' This invention relates to improvements in rubber patches adapted to beused in patching rubber. tire tubes and other rubber goods. v

It is a broad object of this invention to provide an improved patchwhich-has a bev eled edge.

, .It is very goods, especially tire' tubes,

desirable in patching rubber to p'rovidepa .patch consists of a toplayer 10 of'cured rubben Beneath this layer of cured rubber, thereis asecond layer 11 which is formed of uncured rubber and on the under sideof v. lication m gust ad-1924 1 Serial No. 723,172.

the layer 11 of uncured rubber t-here is; a

layer of protective fabric 12. The edges of all of the layersare-beveled, and the patch patch having a beveled edge for the reasonthat such an edge provides a verysmall' projection which may be caughtor rubbed so as to peel the patch from the tire. Heretofore, as far as Iam'aware, such a patch has been provided by molding. Each patch isformed of an outer layer of cured rubber and an inner layer of uncuredrubber. In

order to form a secure patch'uncured rub- 7 of uncured rubber and alayer of fabric,

so that the edges or the layer vof rubber will not become cured or curedas has been experienced w en the patches are molded. It willreadlly be.understood that when the edges ofthe uncured rubber are cured orpartially cured, that these ed es do not firmly stick to the surface oft 1e material being patched, but in-' may beproduced in thefollowingmanner: A section of patching'material is taken consisting of alayer 'of'cure'd rubber, 11ncured'rubber and fabric and this is cuttoproduce the beveled edge, such-as, by cutting it by a knife-in aninclined position. The bevelededges on the layer 11 of uncured rubberand on the layer 10 of cured rubber areindicated at 13 and 14respectively. The patch so produced is characterizedby the fact thatthe'thin edges of the uncured la 'er llare neithercured nor partially.cure When it is" desired to: mend a rubber a beveled edgev eet ofmaterial uncured artially I stead have a tendency'to'peel back, so thatin the course of time, the complete patch is entirely peeled off ,mm thearticlepatched.

With the foregoing and other objects in view which will be'made manifestin the following detailed description and pointed'out in the appendedclaims, reference is had to the accompanying drawings .for anillustrative embodiment. of the invention,-

wherein Figure l is a to-pj 'plan view of theim proved rubber patch, andv 1 -Fig. 2 is a vertical section through-a portion of a tire tube towhich one of the im roved patches has been applied. 1 Referring to theaccompanying drawings wherein similar reference charactersdesignatesimilar parts throughout, the improved article, "such as a tiretube T, cement may be applied to {the article around the puncture oraperture therein. When this cement is substantially dry, the layer ofprotective fabric 12 is removed and the patch applied in the usualmanner. It will be readily understood that the improved patchhas manyadvantages which are present in the conthe desired strength and theuncured rubber which is especially advantageous in' forming a securebond with the tire tube T.

The advantages of-wthe patch of the improved construction' over theconventional patch reside in the fact that the edges of the uncuredlayer 11 whichprojecct from beneath the ed es of the cured layer 1,0'are neither cured nor partially cured, so that these edges. clingtenaciously to the tire I In this manner the edges of the tube. uncuredlayer'llare not apt to loosen from the the tube T- or to start, peelingback. It will readily understood thatif the edges of the patch shouldever start to peel back, after s'uch peeling has started,: -it isnotdifiicult to remove the complete patch:- Another, advantage of thepatch resides in thefact that theedges of. the

patch are beveled so that there will beno sharp edge adapted to' be'caught by or rubbed by the-interior of a tire casing, and jconsequently any relative movement between the tire casing and the tire,tube will not tend' to ruboif or peel off. the patch.

ventional patching material in that it has a layer of cured rubbergiving the patch From the above described construction it will beappreciated that an improved tire patch is provided having two layers,one of uncured rubber and-the other of cured rub- 'ber, and that bothlayers have beveled edges with the edges of the layer of uncured rubberprojecting from beneath the edges of the layer of cured rubber. v

It isto be understood that various changes may be made in the detail ofconstruction without departing from the spirit or scope claims.

of the invention as defined by the appended I claim: I y 1. A rubberpatch consisting her, the edges'of both of said layers being beveledwith the edges of the uncured layer projecting from beneath the edges ofthe cured layer, the edges of said uncured layer of a layerof curedrubber and a layer of uncured rubbeing characterized by being neithercured nor partially cured. 2. A rubber patch consisting of a la er ofcured rubber, a layer of uncured rub er therebeneath having its edgesprojecting from beneath the edges of said layer of cured rubber, and alayer of fabric beneath" said layer. of uncured rubber, the edges ofsaid fabric projecting from beneath the edges of said layer of uncuredrubber, all

of said edges being beveled.

3. A rubber patch consisting of a layer of cured rubber, and a layer 'ofuncured

